LG Electronics · 9.1.3

LG Electronics proposes reusing the Rel-18 'typeIIDoppler-r18' codebook for AI/ML-based CSI prediction inference reporting to avoid the effort of defining new feedback mechanisms. They propose reusing the existing CSI Processing Unit (CPU) mechanism as a starting point for handling the additional computational load of inference algorithms. Regarding performance monitoring, LG Electronics prefers deprioritizing Type 2 monitoring due to large payload overhead, but proposes reusing legacy codebooks for ground truth CSI if Type 2 is supported. They highlight a critical UE implementation issue, proposing that a specific time limit or buffering window be specified for inference results linked to monitoring reports to prevent indefinite buffering. Finally, based on simulation results showing marginal generalization loss, they propose that no additional specification support is required for consistency regarding gNB antenna tilt angles.

LG Electronics advocates FOR simplifying specification requirements by concluding that no additional spec support is needed for gNB antenna tilt angle consistency, while pushing FOR prioritizing Type 1 and Type 3 performance monitoring over Type 2 due to lower reporting overhead and higher accuracy. They are AGAINST Type 2 performance monitoring due to its larger payload requirements and quantization loss issues.

LG Electronics, as the moderator, takes a consensus-building approach advocating for concluding that tilt angle and TXRU mapping have negligible impact on CSI prediction generalization performance based on majority company results. They push for drawing high-level conclusions rather than requiring additional simulations, and support moving forward with the study completion while identifying that specification enhancements may not be needed for these specific network-side additional conditions.

As the document moderator, LG Electronics takes a balanced approach by summarizing industry consensus rather than advocating for specific technical solutions. They facilitate the discussion toward concluding that tilt angle has negligible impact on CSI prediction performance, while acknowledging lack of consensus on TXRU mapping effects. LG Electronics appears to favor evidence-based conclusions that avoid unnecessary specification complexity when performance impacts are minimal.

LG Electronics, as the document moderator, presents a comprehensive summary showing mixed industry consensus on CSI prediction consistency issues. They advocate for concluding that antenna tilt angles have negligible impact and don't require additional signaling, while acknowledging that TXRU mapping shows more varied results with no clear industry consensus, suggesting the need for continued study rather than immediate standardization.